package com.example.community.controller;

import com.example.community.annotation.LoginRequired;
import com.example.community.dao.pojo.User;
import com.example.community.service.FollowService;
import com.example.community.service.LikeService;
import com.example.community.service.UserService;
import com.example.community.uitls.CommunityUtil;
import com.example.community.uitls.HostHolder;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;

import static com.example.community.uitls.CommunityConstant.ENTITY_TYPE_USER;

/**
 * @ClassName: UserController
 * @Description:修改用户信息
 * @Author
 * @Date 2022-03-18
 * @Version 1.0
 */
@Slf4j
@Controller
@RequestMapping("user")
public class UserController {

    @Autowired
    private UserService userService;

    @Autowired
    private FollowService followService;

    @LoginRequired
    @GetMapping("setting")
    public String update(){
        return "/site/setting";
    }

    @Value("${community.path.domain}")
    private String domain;

    @Value("${community.path.upload}")
    private String uploadPath;

    @Autowired
    HostHolder hostHolder;

    @Autowired
    private LikeService likeService;

    /**
     * 上传头像的方法
     */

    @LoginRequired
    @PostMapping("upload")
    public String upload(MultipartFile headerImage, Model model){
        if (headerImage == null) {
            model.addAttribute("error", "您还没有选择图片!");
            return "/site/setting";
        }
        String filename = headerImage.getOriginalFilename();
        String suffix = filename.substring(filename.lastIndexOf("."));
        if (StringUtils.isBlank(suffix)){
            model.addAttribute("error", "文件的格式不正确!");
            return "/site/setting";
        }

        // 生成随机文件名
        filename = CommunityUtil.generateUUID() + suffix;
        // 确定文件存放的路径
        File dest = new File(uploadPath + "/" + filename);
        try{
            headerImage.transferTo(dest);
        }catch (IOException e){
            log.info("上传文件失败: " + e.getMessage());
            throw new RuntimeException("上传文件失败,服务器发生异常!", e);
        }

        // 更新当前用户的头像的路径(web访问路径)
        // http://localhost:8080/user/header/xxx.png
        User user = hostHolder.getUser();
        String headerUrl = domain + "/user/header/" + filename;
        userService.updateHeader(user.getId(),headerUrl);

        return "redirect:/index";
    }

    //从本机获取头像数据
    @GetMapping(path = "/header/{fileName}")
    public void getHeader(@PathVariable("fileName") String fileName, HttpServletResponse response) {
        // 服务器存放路径
        fileName = uploadPath + "/" + fileName;
        // 文件后缀
        String suffix = fileName.substring(fileName.lastIndexOf("."));
        // 响应图片
        response.setContentType("image/" + suffix);
        try (
                FileInputStream fis = new FileInputStream(fileName);
                OutputStream os = response.getOutputStream();
        ) {
            byte[] buffer = new byte[1024];
            int b = 0;
            while ((b = fis.read(buffer)) != -1) {
                os.write(buffer, 0, b);
            }
        } catch (IOException e) {
            log.info("读取头像失败: " + e.getMessage());
        }
    }

    // 个人主页
    @GetMapping("profile/{userId}")
    public String getProfilePage(@PathVariable("userId") int userId,Model model){
        User user = userService.findUserById(userId);
        if(user == null){
            throw  new RuntimeException("该用户不存在");
        }
        //用户
        model.addAttribute("user",user);
        //点赞数量
        int likeCount = likeService.findUserLikeCount(userId);
        model.addAttribute("likeCount", likeCount);
        //关注的数量
        long followeeCount = followService.findFolloweeCount(userId, ENTITY_TYPE_USER);
        model.addAttribute("followeeCount",followeeCount);
        //粉丝的数量
        long followerCount = followService.findFollowerCount(ENTITY_TYPE_USER, user.getId());
        model.addAttribute("followerCount",followerCount);
        //当前用户对此用户是否已关注
        boolean hasFollowed = false;
        if (hostHolder.getUser()!=null){
            hasFollowed = followService.hasFollowed(hostHolder.getUser().getId(),ENTITY_TYPE_USER,userId);
        }

        model.addAttribute("hasFollowed",hasFollowed);

        return "/site/profile";

    }
}
